Question

помогите!!!!!!!даю 50

Answer 1

$tt 6) b^{105}={(b^{15})}^7\\\ 7) (n-7)^8:(n-7)^3=(n-7)^{8-3}=(n-7)^5\\\ 8) n^{10}cdot n^2=n^{10+2}=n^{12}$